... do not exist because other life can't evolve anywhere else and hoaxes and human misconceptions are responsible for over 90% of sightings. The Air Force can prove UFOs do not exist since the sightings have been missed as hoaxes and human misconceptions. Humans have mistaken "meteor trails, comets, odd shaped clouds, balls of lightning, burning marsh gases, airplanes, lights of cars, birds, and many other objects as UFOs," (Kraske 22). Pranksters have also misled UFO investigation by doing actions that confuse and mislead humans. For example, they flash images of car headlights and city lights on the Earth. P ...

... an eight year old boy with pus from a diseased cow. The list goes on, and such experiments continue even until today. Nowadays these experiments would be ethically and legally unacceptable. Nevertheless, there have been clear documented cases of abuse in recent times. An example of this is the experiments conducted by Nazi doctors on prisoners in the concentration camps during the Holocaust. Does this mean that since there is potential for abuse, all experimentation should be banned? This would mean that society would be condemned to remain at the same level of knowledge (status quo)? Bioethically speaking, ...

... hydroelectric plant. However, increasing environmental concerns are focusing attention on renewable energy sources. Hydroelectric power generation was made more efficient by the establishment of the Federal Power Commission in 1920. Although additional hydroelectric plants were being built, the simultaneous development of larger and more cost-efficient steam-power plants made it obvious that only very large and costly hydroelectric installations could compete effectively, and that the federal government would have to assume a major share in their construction. Motivated by the search for the multiple use of water r ...

... that the light from these galaxies was shifted toward the red. That is it's wavelength was longer than that of the light emitted from the corresponding atoms in the lab. Furthermore he found that the farther away the galaxy was the more it was shifted toward the red end of the spectrum. Hubble attributed this shift to the doppler effect. Hubble saw this and concluded that all galaxies are rushing away from us and the universe is expanding as a whole. Modern equipment has observed and verified this so-called Hubble expansion exists throughout the observable universe. This shows three important things. Fi ...

... are not related to eagles, falcons, and vultures they have similar hunting habits and similar equipment for catching and killing - sharp, hooked beaks, and strong, sharp, curved toenails or talons. Owls are nocturnal for the most part and the others hunt during the day. Hawks evolved from raptors which also were birds of prey. Hawks evolved with eagles and falcons mainly but also with some other birds as well. Habitat and Biome Hawks live in all different habitats. Some in the foothills of the mountains while others live in the brushy open country and badlands of Oklahoma, Arizona, New Mexico, Nevada, and Sou ...

... the general public does not view as a definite and imminent danger. Robert T. Watson supports this in his comment about society’s failure to recognize the severity of a potential environmental disaster as a result of . It is important that society treat human-induced as a serious global-scale environmental threat. The overwhelming majority of scientific experts believe human-induced climate change is inevitable. The question is not whether climate will change in response to human activities, but rather where (regional pattern), when (the rate of change) and by how much (magnitude). (17,18). Alarming informat ...

... renovation. Additional sources of the fungal spores could be contaminated or wet wood, bird droppings in air ducts, or decaying fireproofing materials. The fungus causes pneumonia in a host with a weak or otherwise compromised immune system. Patients at risk are those undergoing organ transplant or bone marrow transplants, and depending on the type of transplant, mortality rates are as high as 95%. Bone marrow transplant patients, the highest risk group, should be treated like they are immunosuppressed for up to four weeks after the procedure. The portal of entry is through the upper respiratory track. The in ...

... uniform object lies at the object's center, but it may lie outside the center if any weight is added or subtracted. Many toys that have trouble balancing themselves, have their actual center of gravity far from where an observer would locate it. Another example of the importance of the center of gravity is how an airplane flies. If the center of gravity is too far forward, the plane will have an unstable equilibrium and in turn will take a nose dive into the ground. If the center of gravity is too far aft (back) the plane will fall out of control. You must limit the weight and its positioning on board the a ...

... now cultivated world-wide in a variety of environments. The common tomato, Lycopersicon esculentum Mill., belongs to an extremely diverse and large family the Solanaceae. Often refered to as the Nightshade family, this family contains many of our commonly cultivated plants (potato, peppers, eggplant, tobacco, petunias, tomatillo) and various weeds (nightshades, jimson weed). It may have been this association with the nightshades which originally led people to believe the tomato to be poisionous. It was therefore fortunate that Miller changed the species name to esculentum which roughly means "edible". The common cu ...

... will take place while providing the ideal conditions for diffusion: Movement of molecules from a region of higher concentration to a region of lower concentration, a vital function in the life of a cell. Like wise, the surface area and volume of a cell are directly influential in the efficiency of the cell’s nutrient absorption and waste expulsion processes. Since the cell membrane of an eukaryotic cell is its only source of nutrition, its surface area must be large enough to allow the cell’s organelles to receive the material it needs or it will die. The eukaryotic cell does this by maximizing the surface ...